Difference Shimano SP40 and SP41 gear outers?

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Can someone tell me what the difference is between them?

More to the point, is there any difference in performance?
 

KneesUp

Guru
My analysis tells me that the difference tends toward a value of 1.




I'll get me coat.
 

Gerry Attrick

Lincolnshire Mountain Rescue Consultant
I believe that the SP40 version is the older style spiral wound type whereas the SP41 is the newer linear bound outer.
 

Poacher

Gravitationally challenged member
SP41 should give marginally more protection against UV-B radiation, but there's not much difference.
 
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